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  1. jBPM
  2. JBPM-9915

EJBTimerScheduler.localCache contains entries from already fired timers

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    Description

      We have enabled the EJBTimerScheduler.localCache for performance reasons. While working with a high number of timers, we noticed an increase in memory usage. Even after the timers are fired, entries from EJBTimerScheduler.localCache are not removed:

      Class Name                                                                          | Shallow Heap | Retained Heap
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org.jbpm.services.ejb.timer.EJBTimerScheduler @ 0xb39e6070                          |           24 |   180,538,352
|- <class> class org.jbpm.services.ejb.timer.EJBTimerScheduler @ 0xb3ff6988         |           32 |         3,352
|- utx org.wildfly.transaction.client.LocalUserTransaction @ 0xb2ec5848             |           16 |            16
|- timerService org.jboss.as.ejb3.timerservice.TimerServiceImpl @ 0xb3089378        |           72 |        65,824
|- localCache java.util.concurrent.ConcurrentHashMap @ 0xb39e6088                   |           64 |   180,538,328
|  |- <class> class java.util.concurrent.ConcurrentHashMap @ 0xae82b1e8 System Class|          136 |           648
|  |- table java.util.concurrent.ConcurrentHashMap$Node[16384] @ 0xc12ea8e0         |       65,552 |   180,538,264
|  |  |- <class> class java.util.concurrent.ConcurrentHashMap$Node[] @ 0xae827d88   |            0 |             0
|  |  |- [7082] java.util.concurrent.ConcurrentHashMap$Node @ 0xb4eeea50            |           32 |        18,072
|  |  |- [6061] java.util.concurrent.ConcurrentHashMap$Node @ 0xb4efd370            |           32 |        18,072
|  |  |- [11097] java.util.concurrent.ConcurrentHashMap$Node @ 0xb4fe85c0           |           32 |        18,072
|  |  |- [11494] java.util.concurrent.ConcurrentHashMap$Node @ 0xb4ff11e0           |           32 |        18,072
|  |  |- [1921] java.util.concurrent.ConcurrentHashMap$Node @ 0xb4ff68d0            |           32 |        36,144
|  |  '- Total: 25 of 7,448 entries; 7,423 more                                     |              |              
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      We expect the timer entries to be removed once they have fired.

      Attachments

        1. server.log
          207 kB
        2. TimerProcess.bpmn2
          19 kB

        Issue Links

          clones

          Bug - A problem that impairs or prevents the functions of the product. RHPAM-3936 EJBTimerScheduler.localCache contains entries from already fired timers

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

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              elguardian@gmail.com Enrique González Martínez (Inactive)
              elguardian@gmail.com Enrique González Martínez (Inactive)
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                Updated:
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